REPORT ON THE PYCNOGONIDA, 79 
atively strong: itis not denticulated on the inner surface but slightly serrated. The joints 
of the ovigerous legs are almost quite smooth. The shape of the denticulate spines is 
very curious. They are broad and flat, have two or three stronger teeth on each side 
near the base, and extremely fine teeth all over the rest. 
The very smooth legs are comparatively long. The first and the third joints are short and 
almost of equal length, the second joint is more than twice as long, having a large oval 
genital opening at the extremity on the ventral surface. The fourth joint, containing the 
ovary, is considerably swollen and very long ; the fifth is only a little shorter, the sixth, 
on the contrary, is a little longer. The two tarsal joints are very small, together about one- 
fifth of the length of the sixth joint. Almost every joint describes a feeble but character- 
istic curve ; especially the second, the fourth and the eighth joint. The first tarsal joint 
is extremely small, and is furnished with a,large number of hairs and an isolated stronger 
spine, the second tarsal joint also shows a number of hairs and four stronger spines 
opposite to the claw. The claw is strong and very long, considerably curved, and with- 
out auxiliary claws. : 
The only specimen of this species dredged during the cruise of H.M.S, Challenger 
is a female, which, I think, is a full-grown one. 
Habitat.—This species, along with a specimen of Pallene australiensis, Hoek, was 
collected at Station 162. April 2, 1874. Off East Moncceur Island, Bass Strait. Depth 
of the sea, 38 to 40 fathoms. Bottom of the sea, sand. 
Observations.—This very characteristic species may be easily recognised among the 
" different species of Pallene by the form of the proboscis and cephalothoracie segment, by 
the shape of the denticulate spines of the ovigerous legs, by the presence of a claw at the 
end of the ovigerous leg, and finally by the absence of auxiliary claws at the end of 
the legs. 
Pallene langwda, un. sp. (Pl. XII. figs. 1-5). 
Diagnosis.—Body highly concentrated, rather disciform.  Proboscis conical, 
cephalothoracic segment comparatively long. Ovigerous legs with denticulated spines, 
but without a claw. Legs without auxiliary claws. Oculiferous tubercle conical, elevated. 
Rudiments of palpi in the form of knobs. 
Description.— 
Length of the proboscis, ; " - é : : 5 0°45 mm, 
Length of the trunk, : ; ; B : : c : Ii) 
Total length of the body, : 0 : i 5 ; : Ws 
Length of the ovigerous leg, : ; : ~* ; : : 223) 
Length of the leg of the third pair, ; < : * ; Olina. 
Of this curious species, unfortunately, only a single specimen was collected, and this 
specimen had, moreover, suffered much from the alcohol ; it is visibly crumpled, especially 
